Your Cart is Empty

  • Add description, images, menus and links to your mega menu

  • A column with no settings can be used as a spacer

  • Link to your collections, sales and even external links

  • Add up to five columns

  • Jabsco Par-Max HD4 Heavy Duty Water Pressure Pump - 12V - 4 GPM - 40 PSI [Q401J-115S-3A]

    Par-Max HD4 Heavy Duty Water Pressure Pump - 12V - 4 GPM - 40 PSI

    HD (Heavy Duty) models include a wider diameter motor with a powder coated shell, cast aluminum endbells and lower housing to improve pressure capability and life. Available in configurations up to 6 GPM (23 LPM) and 60 PSI (4.1 BAR), these pumps deliver exceptional performance. 

    Standard models provide good performance in an economical footprint. These configurations are available in 1-3 GPM, perfect for vessels with 1-3 outlets. A plastic housing protects the motors on these units from corrosion. 


    • Co-molded diaphragm technology for long life and durability
    • HD models feature heavy duty, motors and cast aluminum lower housings which allow for longlife, even at high pressures
    • Efficient and quiet operation
    • Integrated, sealed pressure switch for on-demand operation
    • Self-priming allows for installation versatility
    • Can run dry without damage
    • Quick connect ports for ease of installation, servicing, and maintenance
    • Vibration dampening mounting feet
    • Equipped with integrated bypass module to reduce cycling and provide smoother flow


    • Motor design: Brushed, permanent magnet TENV 
    • Pumphead upper housing material: Glass fiber reinforced polypropylene 
    • Diaphragm: Co-molded TPV 
    • Check valves: EPDM 
    • Max inlet pressure: 30 PSI (2.1 Bar) 
    • Fluid temperature range: 32°F – 140°F (0°C – 60°C) 
    • Dry self-priming capability: 7ft min (2.13m/min) 
    • Certifications: CE, ISO8846, RCM
    • Ingress Protection: IPX6

    WarningWARNING: This product can expose you to chemicals including ANTIMONY OXIDE (ANTIMONY TRIOXIDE) which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.


    • Volts: 12v
    • Max PSI: 40
    • Gallons Per Minute: 4 GPM
    • Box Dimensions: 5"H x 6"W x 15"L WT: 7.85 lbs
    • UPC: 671880841863

    Brochure (pdf)